SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/wireless/sme.c

   1 /*
   2  * SME code for cfg80211's connect emulation.
   3  *
   4  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/etherdevice.h>
   9 #include <linux/if_arp.h>
  10 #include <linux/workqueue.h>
  11 #include <linux/wireless.h>
  12 #include <net/iw_handler.h>
  13 #include <net/cfg80211.h>
  14 #include <net/rtnetlink.h>
  15 #include "nl80211.h"
  16
  17 struct cfg80211_conn {
  18         struct cfg80211_connect_params params;
  19         /* these are sub-states of the _CONNECTING sme_state */
  20         enum {
  21                 CFG80211_CONN_IDLE,
  22                 CFG80211_CONN_SCANNING,
  23                 CFG80211_CONN_SCAN_AGAIN,
  24                 CFG80211_CONN_AUTHENTICATE_NEXT,
  25                 CFG80211_CONN_AUTHENTICATING,
  26                 CFG80211_CONN_ASSOCIATE_NEXT,
  27                 CFG80211_CONN_ASSOCIATING,
  28         } state;
  29         u8 bssid[ETH_ALEN];
  30         u8 *ie;
  31         size_t ie_len;
  32         bool auto_auth;
  33 };
  34
  35
  36 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  37 {
  38         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  39         struct cfg80211_scan_request *request;
  40         int n_channels, err;
  41
  42         ASSERT_RTNL();
  43         ASSERT_RDEV_LOCK(rdev);
  44         ASSERT_WDEV_LOCK(wdev);
  45
  46         if (rdev->scan_req)
  47                 return -EBUSY;
  48
  49         if (wdev->conn->params.channel) {
  50                 n_channels = 1;
  51         } else {
  52                 enum ieee80211_band band;
  53                 n_channels = 0;
  54
  55                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  56                         if (!wdev->wiphy->bands[band])
  57                                 continue;
  58                         n_channels += wdev->wiphy->bands[band]->n_channels;
  59                 }
  60         }
  61         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  62                           sizeof(request->channels[0]) * n_channels,
  63                           GFP_KERNEL);
  64         if (!request)
  65                 return -ENOMEM;
  66
  67         request->channels = (void *)((char *)request + sizeof(*request));
  68         if (wdev->conn->params.channel)
  69                 request->channels[0] = wdev->conn->params.channel;
  70         else {
  71                 int i = 0, j;
  72                 enum ieee80211_band band;
  73
  74                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  75                         if (!wdev->wiphy->bands[band])
  76                                 continue;
  77                         for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
  78                              i++, j++)
  79                                 request->channels[i] =
  80                                         &wdev->wiphy->bands[band]->channels[j];
  81                 }
  82         }
  83         request->n_channels = n_channels;
  84         request->ssids = (void *)(request->channels + n_channels);
  85         request->n_ssids = 1;
  86
  87         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
  88                 wdev->conn->params.ssid_len);
  89         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
  90
  91         request->dev = wdev->netdev;
  92         request->wiphy = &rdev->wiphy;
  93
  94         rdev->scan_req = request;
  95
  96         err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
  97         if (!err) {
  98                 wdev->conn->state = CFG80211_CONN_SCANNING;
  99                 nl80211_send_scan_start(rdev, wdev->netdev);
 100                 dev_hold(wdev->netdev);
 101         } else {
 102                 rdev->scan_req = NULL;
 103                 kfree(request);
 104         }
 105         return err;
 106 }
 107
 108 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 109 {
 110         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 111         struct cfg80211_connect_params *params;
 112         int err;
 113
 114         ASSERT_WDEV_LOCK(wdev);
 115
 116         if (!wdev->conn)
 117                 return 0;
 118
 119         params = &wdev->conn->params;
 120
 121         switch (wdev->conn->state) {
 122         case CFG80211_CONN_SCAN_AGAIN:
 123                 return cfg80211_conn_scan(wdev);
 124         case CFG80211_CONN_AUTHENTICATE_NEXT:
 125                 BUG_ON(!rdev->ops->auth);
 126                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 127                 return __cfg80211_mlme_auth(rdev, wdev->netdev,
 128                                             params->channel, params->auth_type,
 129                                             params->bssid,
 130                                             params->ssid, params->ssid_len,
 131                                             NULL, 0,
 132                                             params->key, params->key_len,
 133                                             params->key_idx);
 134         case CFG80211_CONN_ASSOCIATE_NEXT:
 135                 BUG_ON(!rdev->ops->assoc);
 136                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 137                 /*
 138                  * We could, later, implement roaming here and then actually
 139                  * set prev_bssid to non-NULL. But then we need to be aware
 140                  * that some APs don't like that -- so we'd need to retry
 141                  * the association.
 142                  */
 143                 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
 144                                             params->channel, params->bssid,
 145                                             NULL,
 146                                             params->ssid, params->ssid_len,
 147                                             params->ie, params->ie_len,
 148                                             false, &params->crypto);
 149                 if (err)
 150                         __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 151                                                NULL, 0,
 152                                                WLAN_REASON_DEAUTH_LEAVING);
 153                 return err;
 154         default:
 155                 return 0;
 156         }
 157 }
 158
 159 void cfg80211_conn_work(struct work_struct *work)
 160 {
 161         struct cfg80211_registered_device *rdev =
 162                 container_of(work, struct cfg80211_registered_device, conn_work);
 163         struct wireless_dev *wdev;
 164
 165         rtnl_lock();
 166         cfg80211_lock_rdev(rdev);
 167         mutex_lock(&rdev->devlist_mtx);
 168
 169         list_for_each_entry(wdev, &rdev->netdev_list, list) {
 170                 wdev_lock(wdev);
 171                 if (!netif_running(wdev->netdev)) {
 172                         wdev_unlock(wdev);
 173                         continue;
 174                 }
 175                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 176                         wdev_unlock(wdev);
 177                         continue;
 178                 }
 179                 if (cfg80211_conn_do_work(wdev))
 180                         __cfg80211_connect_result(
 181                                         wdev->netdev,
 182                                         wdev->conn->params.bssid,
 183                                         NULL, 0, NULL, 0,
 184                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 185                                         false, NULL);
 186                 wdev_unlock(wdev);
 187         }
 188
 189         mutex_unlock(&rdev->devlist_mtx);
 190         cfg80211_unlock_rdev(rdev);
 191         rtnl_unlock();
 192 }
 193
 194 static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
 195 {
 196         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 197         struct cfg80211_bss *bss;
 198         u16 capa = WLAN_CAPABILITY_ESS;
 199
 200         ASSERT_WDEV_LOCK(wdev);
 201
 202         if (wdev->conn->params.privacy)
 203                 capa |= WLAN_CAPABILITY_PRIVACY;
 204
 205         bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
 206                                wdev->conn->params.ssid,
 207                                wdev->conn->params.ssid_len,
 208                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 209                                capa);
 210         if (!bss)
 211                 return false;
 212
 213         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 214         wdev->conn->params.bssid = wdev->conn->bssid;
 215         wdev->conn->params.channel = bss->channel;
 216         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 217         schedule_work(&rdev->conn_work);
 218
 219         cfg80211_put_bss(bss);
 220         return true;
 221 }
 222
 223 static void __cfg80211_sme_scan_done(struct net_device *dev)
 224 {
 225         struct wireless_dev *wdev = dev->ieee80211_ptr;
 226         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 227
 228         ASSERT_WDEV_LOCK(wdev);
 229
 230         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 231                 return;
 232
 233         if (!wdev->conn)
 234                 return;
 235
 236         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 237             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 238                 return;
 239
 240         if (!cfg80211_get_conn_bss(wdev)) {
 241                 /* not found */
 242                 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
 243                         schedule_work(&rdev->conn_work);
 244                 else
 245                         __cfg80211_connect_result(
 246                                         wdev->netdev,
 247                                         wdev->conn->params.bssid,
 248                                         NULL, 0, NULL, 0,
 249                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 250                                         false, NULL);
 251         }
 252 }
 253
 254 void cfg80211_sme_scan_done(struct net_device *dev)
 255 {
 256         struct wireless_dev *wdev = dev->ieee80211_ptr;
 257
 258         wdev_lock(wdev);
 259         __cfg80211_sme_scan_done(dev);
 260         wdev_unlock(wdev);
 261 }
 262
 263 void cfg80211_sme_rx_auth(struct net_device *dev,
 264                           const u8 *buf, size_t len)
 265 {
 266         struct wireless_dev *wdev = dev->ieee80211_ptr;
 267         struct wiphy *wiphy = wdev->wiphy;
 268         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 269         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 270         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 271
 272         ASSERT_WDEV_LOCK(wdev);
 273
 274         /* should only RX auth frames when connecting */
 275         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 276                 return;
 277
 278         if (WARN_ON(!wdev->conn))
 279                 return;
 280
 281         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 282             wdev->conn->auto_auth &&
 283             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 284                 /* select automatically between only open, shared, leap */
 285                 switch (wdev->conn->params.auth_type) {
 286                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 287                         if (wdev->connect_keys)
 288                                 wdev->conn->params.auth_type =
 289                                         NL80211_AUTHTYPE_SHARED_KEY;
 290                         else
 291                                 wdev->conn->params.auth_type =
 292                                         NL80211_AUTHTYPE_NETWORK_EAP;
 293                         break;
 294                 case NL80211_AUTHTYPE_SHARED_KEY:
 295                         wdev->conn->params.auth_type =
 296                                 NL80211_AUTHTYPE_NETWORK_EAP;
 297                         break;
 298                 default:
 299                         /* huh? */
 300                         wdev->conn->params.auth_type =
 301                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 302                         break;
 303                 }
 304                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 305                 schedule_work(&rdev->conn_work);
 306         } else if (status_code != WLAN_STATUS_SUCCESS) {
 307                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 308                                           status_code, false, NULL);
 309         } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 310                  wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 311                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 312                 schedule_work(&rdev->conn_work);
 313         }
 314 }
 315
 316 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 317                                const u8 *req_ie, size_t req_ie_len,
 318                                const u8 *resp_ie, size_t resp_ie_len,
 319                                u16 status, bool wextev,
 320                                struct cfg80211_bss *bss)
 321 {
 322         struct wireless_dev *wdev = dev->ieee80211_ptr;
 323 #ifdef CONFIG_WIRELESS_EXT
 324         union iwreq_data wrqu;
 325 #endif
 326
 327         ASSERT_WDEV_LOCK(wdev);
 328
 329         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 330                 return;
 331
 332         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 333                 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
 334                                     bssid, req_ie, req_ie_len,
 335                                     resp_ie, resp_ie_len, GFP_KERNEL);
 336         else
 337                 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
 338                                             bssid, req_ie, req_ie_len,
 339                                             resp_ie, resp_ie_len,
 340                                             status, GFP_KERNEL);
 341
 342 #ifdef CONFIG_WIRELESS_EXT
 343         if (wextev) {
 344                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 345                         memset(&wrqu, 0, sizeof(wrqu));
 346                         wrqu.data.length = req_ie_len;
 347                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
 348                 }
 349
 350                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 351                         memset(&wrqu, 0, sizeof(wrqu));
 352                         wrqu.data.length = resp_ie_len;
 353                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 354                 }
 355
 356                 memset(&wrqu, 0, sizeof(wrqu));
 357                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 358                 if (bssid && status == WLAN_STATUS_SUCCESS)
 359                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 360                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 361         }
 362 #endif
 363
 364         if (wdev->current_bss) {
 365                 cfg80211_unhold_bss(wdev->current_bss);
 366                 cfg80211_put_bss(&wdev->current_bss->pub);
 367                 wdev->current_bss = NULL;
 368         }
 369
 370         if (status == WLAN_STATUS_SUCCESS &&
 371             wdev->sme_state == CFG80211_SME_IDLE)
 372                 goto success;
 373
 374         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 375                 return;
 376
 377         if (wdev->conn)
 378                 wdev->conn->state = CFG80211_CONN_IDLE;
 379
 380         if (status != WLAN_STATUS_SUCCESS) {
 381                 wdev->sme_state = CFG80211_SME_IDLE;
 382                 kfree(wdev->conn);
 383                 wdev->conn = NULL;
 384                 kfree(wdev->connect_keys);
 385                 wdev->connect_keys = NULL;
 386                 return;
 387         }
 388
 389  success:
 390         if (!bss)
 391                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 392                                        wdev->ssid, wdev->ssid_len,
 393                                        WLAN_CAPABILITY_ESS,
 394                                        WLAN_CAPABILITY_ESS);
 395
 396         if (WARN_ON(!bss))
 397                 return;
 398
 399         cfg80211_hold_bss(bss_from_pub(bss));
 400         wdev->current_bss = bss_from_pub(bss);
 401
 402         wdev->sme_state = CFG80211_SME_CONNECTED;
 403         cfg80211_upload_connect_keys(wdev);
 404 }
 405
 406 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 407                              const u8 *req_ie, size_t req_ie_len,
 408                              const u8 *resp_ie, size_t resp_ie_len,
 409                              u16 status, gfp_t gfp)
 410 {
 411         struct wireless_dev *wdev = dev->ieee80211_ptr;
 412         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 413         struct cfg80211_event *ev;
 414         unsigned long flags;
 415
 416         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 417         if (!ev)
 418                 return;
 419
 420         ev->type = EVENT_CONNECT_RESULT;
 421         memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 422         ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 423         ev->cr.req_ie_len = req_ie_len;
 424         memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 425         ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 426         ev->cr.resp_ie_len = resp_ie_len;
 427         memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 428         ev->cr.status = status;
 429
 430         spin_lock_irqsave(&wdev->event_lock, flags);
 431         list_add_tail(&ev->list, &wdev->event_list);
 432         spin_unlock_irqrestore(&wdev->event_lock, flags);
 433         schedule_work(&rdev->event_work);
 434 }
 435 EXPORT_SYMBOL(cfg80211_connect_result);
 436
 437 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
 438                        const u8 *req_ie, size_t req_ie_len,
 439                        const u8 *resp_ie, size_t resp_ie_len)
 440 {
 441         struct cfg80211_bss *bss;
 442 #ifdef CONFIG_WIRELESS_EXT
 443         union iwreq_data wrqu;
 444 #endif
 445
 446         ASSERT_WDEV_LOCK(wdev);
 447
 448         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 449                 return;
 450
 451         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 452                 return;
 453
 454         /* internal error -- how did we get to CONNECTED w/o BSS? */
 455         if (WARN_ON(!wdev->current_bss)) {
 456                 return;
 457         }
 458
 459         cfg80211_unhold_bss(wdev->current_bss);
 460         cfg80211_put_bss(&wdev->current_bss->pub);
 461         wdev->current_bss = NULL;
 462
 463         bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 464                                wdev->ssid, wdev->ssid_len,
 465                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 466
 467         if (WARN_ON(!bss))
 468                 return;
 469
 470         cfg80211_hold_bss(bss_from_pub(bss));
 471         wdev->current_bss = bss_from_pub(bss);
 472
 473         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
 474                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 475                             GFP_KERNEL);
 476
 477 #ifdef CONFIG_WIRELESS_EXT
 478         if (req_ie) {
 479                 memset(&wrqu, 0, sizeof(wrqu));
 480                 wrqu.data.length = req_ie_len;
 481                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 482                                     &wrqu, req_ie);
 483         }
 484
 485         if (resp_ie) {
 486                 memset(&wrqu, 0, sizeof(wrqu));
 487                 wrqu.data.length = resp_ie_len;
 488                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 489                                     &wrqu, resp_ie);
 490         }
 491
 492         memset(&wrqu, 0, sizeof(wrqu));
 493         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 494         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 495         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 496 #endif
 497 }
 498
 499 void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
 500                      const u8 *req_ie, size_t req_ie_len,
 501                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 502 {
 503         struct wireless_dev *wdev = dev->ieee80211_ptr;
 504         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 505         struct cfg80211_event *ev;
 506         unsigned long flags;
 507
 508         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 509         if (!ev)
 510                 return;
 511
 512         ev->type = EVENT_ROAMED;
 513         memcpy(ev->rm.bssid, bssid, ETH_ALEN);
 514         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 515         ev->rm.req_ie_len = req_ie_len;
 516         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 517         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 518         ev->rm.resp_ie_len = resp_ie_len;
 519         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 520
 521         spin_lock_irqsave(&wdev->event_lock, flags);
 522         list_add_tail(&ev->list, &wdev->event_list);
 523         spin_unlock_irqrestore(&wdev->event_lock, flags);
 524         schedule_work(&rdev->event_work);
 525 }
 526 EXPORT_SYMBOL(cfg80211_roamed);
 527
 528 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 529                              size_t ie_len, u16 reason, bool from_ap)
 530 {
 531         struct wireless_dev *wdev = dev->ieee80211_ptr;
 532         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 533         int i;
 534 #ifdef CONFIG_WIRELESS_EXT
 535         union iwreq_data wrqu;
 536 #endif
 537
 538         ASSERT_WDEV_LOCK(wdev);
 539
 540         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 541                 return;
 542
 543         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 544                 return;
 545
 546         if (wdev->current_bss) {
 547                 cfg80211_unhold_bss(wdev->current_bss);
 548                 cfg80211_put_bss(&wdev->current_bss->pub);
 549         }
 550
 551         wdev->current_bss = NULL;
 552         wdev->sme_state = CFG80211_SME_IDLE;
 553
 554         if (wdev->conn) {
 555                 kfree(wdev->conn->ie);
 556                 wdev->conn->ie = NULL;
 557                 kfree(wdev->conn);
 558                 wdev->conn = NULL;
 559         }
 560
 561         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 562
 563         /*
 564          * Delete all the keys ... pairwise keys can't really
 565          * exist any more anyway, but default keys might.
 566          */
 567         if (rdev->ops->del_key)
 568                 for (i = 0; i < 6; i++)
 569                         rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
 570
 571 #ifdef CONFIG_WIRELESS_EXT
 572         memset(&wrqu, 0, sizeof(wrqu));
 573         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 574         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 575 #endif
 576 }
 577
 578 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 579                            u8 *ie, size_t ie_len, gfp_t gfp)
 580 {
 581         struct wireless_dev *wdev = dev->ieee80211_ptr;
 582         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 583         struct cfg80211_event *ev;
 584         unsigned long flags;
 585
 586         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 587         if (!ev)
 588                 return;
 589
 590         ev->type = EVENT_DISCONNECTED;
 591         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 592         ev->dc.ie_len = ie_len;
 593         memcpy((void *)ev->dc.ie, ie, ie_len);
 594         ev->dc.reason = reason;
 595
 596         spin_lock_irqsave(&wdev->event_lock, flags);
 597         list_add_tail(&ev->list, &wdev->event_list);
 598         spin_unlock_irqrestore(&wdev->event_lock, flags);
 599         schedule_work(&rdev->event_work);
 600 }
 601 EXPORT_SYMBOL(cfg80211_disconnected);
 602
 603 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 604                        struct net_device *dev,
 605                        struct cfg80211_connect_params *connect,
 606                        struct cfg80211_cached_keys *connkeys)
 607 {
 608         struct wireless_dev *wdev = dev->ieee80211_ptr;
 609         int err;
 610
 611         ASSERT_WDEV_LOCK(wdev);
 612
 613         if (wdev->sme_state != CFG80211_SME_IDLE)
 614                 return -EALREADY;
 615
 616         if (WARN_ON(wdev->connect_keys)) {
 617                 kfree(wdev->connect_keys);
 618                 wdev->connect_keys = NULL;
 619         }
 620
 621         if (connkeys && connkeys->def >= 0) {
 622                 int idx;
 623
 624                 idx = connkeys->def;
 625                 /* If given a WEP key we may need it for shared key auth */
 626                 if (connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP40 ||
 627                     connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP104) {
 628                         connect->key_idx = idx;
 629                         connect->key = connkeys->params[idx].key;
 630                         connect->key_len = connkeys->params[idx].key_len;
 631                 }
 632         }
 633
 634         if (!rdev->ops->connect) {
 635                 if (!rdev->ops->auth || !rdev->ops->assoc)
 636                         return -EOPNOTSUPP;
 637
 638                 if (WARN_ON(wdev->conn))
 639                         return -EINPROGRESS;
 640
 641                 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 642                 if (!wdev->conn)
 643                         return -ENOMEM;
 644
 645                 /*
 646                  * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 647                  */
 648                 memcpy(&wdev->conn->params, connect, sizeof(*connect));
 649                 if (connect->bssid) {
 650                         wdev->conn->params.bssid = wdev->conn->bssid;
 651                         memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 652                 }
 653
 654                 if (connect->ie) {
 655                         wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 656                                                 GFP_KERNEL);
 657                         wdev->conn->params.ie = wdev->conn->ie;
 658                         if (!wdev->conn->ie) {
 659                                 kfree(wdev->conn);
 660                                 wdev->conn = NULL;
 661                                 return -ENOMEM;
 662                         }
 663                 }
 664
 665                 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 666                         wdev->conn->auto_auth = true;
 667                         /* start with open system ... should mostly work */
 668                         wdev->conn->params.auth_type =
 669                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 670                 } else {
 671                         wdev->conn->auto_auth = false;
 672                 }
 673
 674                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 675                 wdev->ssid_len = connect->ssid_len;
 676                 wdev->conn->params.ssid = wdev->ssid;
 677                 wdev->conn->params.ssid_len = connect->ssid_len;
 678
 679                 /* don't care about result -- but fill bssid & channel */
 680                 if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
 681                         cfg80211_get_conn_bss(wdev);
 682
 683                 wdev->sme_state = CFG80211_SME_CONNECTING;
 684                 wdev->connect_keys = connkeys;
 685
 686                 /* we're good if we have both BSSID and channel */
 687                 if (wdev->conn->params.bssid && wdev->conn->params.channel) {
 688                         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 689                         err = cfg80211_conn_do_work(wdev);
 690                 } else {
 691                         /* otherwise we'll need to scan for the AP first */
 692                         err = cfg80211_conn_scan(wdev);
 693                         /*
 694                          * If we can't scan right now, then we need to scan again
 695                          * after the current scan finished, since the parameters
 696                          * changed (unless we find a good AP anyway).
 697                          */
 698                         if (err == -EBUSY) {
 699                                 err = 0;
 700                                 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 701                         }
 702                 }
 703                 if (err) {
 704                         kfree(wdev->conn);
 705                         wdev->conn = NULL;
 706                         wdev->sme_state = CFG80211_SME_IDLE;
 707                         wdev->connect_keys = NULL;
 708                 }
 709
 710                 return err;
 711         } else {
 712                 wdev->sme_state = CFG80211_SME_CONNECTING;
 713                 wdev->connect_keys = connkeys;
 714                 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
 715                 if (err) {
 716                         wdev->connect_keys = NULL;
 717                         wdev->sme_state = CFG80211_SME_IDLE;
 718                         return err;
 719                 }
 720
 721                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 722                 wdev->ssid_len = connect->ssid_len;
 723
 724                 return 0;
 725         }
 726 }
 727
 728 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 729                      struct net_device *dev,
 730                      struct cfg80211_connect_params *connect,
 731                      struct cfg80211_cached_keys *connkeys)
 732 {
 733         int err;
 734
 735         wdev_lock(dev->ieee80211_ptr);
 736         err = __cfg80211_connect(rdev, dev, connect, connkeys);
 737         wdev_unlock(dev->ieee80211_ptr);
 738
 739         return err;
 740 }
 741
 742 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 743                           struct net_device *dev, u16 reason, bool wextev)
 744 {
 745         struct wireless_dev *wdev = dev->ieee80211_ptr;
 746         int err;
 747
 748         ASSERT_WDEV_LOCK(wdev);
 749
 750         if (wdev->sme_state == CFG80211_SME_IDLE)
 751                 return -EINVAL;
 752
 753         kfree(wdev->connect_keys);
 754         wdev->connect_keys = NULL;
 755
 756         if (!rdev->ops->disconnect) {
 757                 if (!rdev->ops->deauth)
 758                         return -EOPNOTSUPP;
 759
 760                 /* was it connected by userspace SME? */
 761                 if (!wdev->conn) {
 762                         cfg80211_mlme_down(rdev, dev);
 763                         return 0;
 764                 }
 765
 766                 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 767                     (wdev->conn->state == CFG80211_CONN_SCANNING ||
 768                      wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 769                         wdev->sme_state = CFG80211_SME_IDLE;
 770                         kfree(wdev->conn);
 771                         wdev->conn = NULL;
 772                         return 0;
 773                 }
 774
 775                 /* wdev->conn->params.bssid must be set if > SCANNING */
 776                 err = __cfg80211_mlme_deauth(rdev, dev,
 777                                              wdev->conn->params.bssid,
 778                                              NULL, 0, reason);
 779                 if (err)
 780                         return err;
 781         } else {
 782                 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 783                 if (err)
 784                         return err;
 785         }
 786
 787         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 788                 __cfg80211_disconnected(dev, NULL, 0, 0, false);
 789         else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 790                 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 791                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 792                                           wextev, NULL);
 793
 794         return 0;
 795 }
 796
 797 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 798                         struct net_device *dev,
 799                         u16 reason, bool wextev)
 800 {
 801         int err;
 802
 803         wdev_lock(dev->ieee80211_ptr);
 804         err = __cfg80211_disconnect(rdev, dev, reason, wextev);
 805         wdev_unlock(dev->ieee80211_ptr);
 806
 807         return err;
 808 }
 809
 810 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
 811 {
 812         struct wireless_dev *wdev = dev->ieee80211_ptr;
 813         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 814         u8 bssid[ETH_ALEN];
 815
 816         ASSERT_WDEV_LOCK(wdev);
 817
 818         if (!wdev->conn)
 819                 return;
 820
 821         if (wdev->conn->state == CFG80211_CONN_IDLE)
 822                 return;
 823
 824         /*
 825          * Ok, so the association was made by this SME -- we don't
 826          * want it any more so deauthenticate too.
 827          */
 828
 829         if (!wdev->auth_bsses[idx])
 830                 return;
 831
 832         memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
 833         if (__cfg80211_mlme_deauth(rdev, dev, bssid,
 834                                    NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
 835                 /* whatever -- assume gone anyway */
 836                 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
 837                 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
 838                 wdev->auth_bsses[idx] = NULL;
 839         }
 840 }